I would like to know how to create struct and enum..

import io::*;

struct Point {x:float, y:float}

enum Shape{
    Circle(Point, float),
    Rectangle(Point, Point)
}

fn area(sh: Shape)->float{


    match sh{
        Circle(_,size)=>float::consts::pi*size*size,

        Rectangle(point1, point2)=>(point2.x-point1.x)*(point2.y-point1.y)
    }
}

fn main(){

    Circle{(4.5,5.5,),1.0};

    area(circle);

}

it doesn't work.. I'm a person who is using english as second language..
So there's a problem to understand document..

Please Let me know how to use it properly

[killerswan]

As we talked about on IRC, this was an example that helped (I'm using version 0.4dev):

use std;
use io::*;

struct Point {x:float, y:float}

enum Shape{
   Circle(Point, float),
   Rectangle(Point, Point)
}

fn area(sh: Shape) -> float {
   match sh {
      Circle(_,size) => float::consts::pi*size*size,
      Rectangle(point1, point2) => (point2.x-point1.x)*(point2.y-point1.y)
   }
}

fn main() {
   let pt: Point = Point {x:4.5, y:5.5};
   let circle: Shape = Circle(pt,1.7);
   area(circle);

   let pi = float::consts::pi;

   if area(circle) - 1.7 * 1.7 * pi < 0.1  { io::println("OK"); }
}

[catamorphism]

Closing this; no clear bug being reported.